Diethoxydimethylsilane
Diethoxydimethylsilane (CAS: 78-62-6) is a reactive organosilane featuring two hydrolyzable ethoxy groups attached to a silicon center carrying two methyl groups. This clear, moisture-sensitive liquid hydrolyzes in the presence of water to form silanol species that can condense onto silica, glass, metal, and mineral surfaces, while its two methyl substituents impart hydrophobicity and low surface energy. The compound is widely used as a chain terminator and end-capping agent in silicone polymer production, where it precisely controls molecular weight and improves the processability and stability of silicone oils, rubbers, and resins. It also functions as an efficient surface modifier for fillers such as fumed silica, enhancing dispersion within rubber and plastic compounds and reducing viscosity. In coatings and adhesives it improves water repellency, adhesion, and durability. With its balanced reactivity and methyl-group functionality, diethoxydimethylsilane is an essential building block in silicone chemistry and surface engineering.
– Silicone Polymer Production: Used as an end-capping and chain-terminating agent to control molecular weight and viscosity of silicone oils, gums, and resins during polycondensation processes.
– Filler Surface Treatment: Applied to modify silica, clay, and mineral fillers, improving their hydrophobicity, dispersion, and compatibility in rubber, sealant, and plastic formulations.
– Coatings and Surface Protection: Employed as a water-repellent surface modifier for concrete, stone, glass, and masonry, enhancing durability and resistance to moisture ingress.
– Adhesives and Sealants: Incorporated to improve substrate wetting, adhesion, and hydrolytic stability in moisture-curing silicone and hybrid sealant systems.
Product Name: Diethoxydimethylsilane
For global customers, we provide complete technical documentation to support product evaluation, regulatory compliance and safe handling during transportation and application.